The table shows the number of cars and trucks that used a certain toll road on a particular day. The number of cars and trucks that used, and did not use, an electronic toll pass on that same day was also recorded.Toll PassCars Trucks TotalUsed537330867Did not use9046491553Total14419792420a) If one of these vehicles is selected at random, determine the probability that the vehicle is a car.b) If one of these vehicles is selected at random, determine the probability that the vehicle is a car, given that it used the toll passa) The probability that the vehicle was a car is(Round to four decimal places as needed.)

The Table Shows The Number Of Cars And Trucks That Used A Certain Toll Road On A Particular Day. The

Answers

Answer 1

We are given a two-way probability table

Part a)

If one of the vehicles is selected at random, determine the probability that the vehicle is a car.

From the table, we see that the total number of cars are 1441

Also, the total number of vehicles is 2420

Then the probability of selecting a car is

[tex]P(car)=\frac{1441}{2420}=0.5955[/tex]

Therefore, the probability that the vehicle was a car is found to be 0.5955

Part b)

If one of the vehicles is selected at random, determine the probability that it used the electronic toll pass, given that it was a car.

This is a conditional probability problem.

The conditional probability is given by

[tex]P(used\: |\: car)=\frac{n(used\: and\: car)}{n(car)}[/tex]

From the table, we see that,

[tex]\begin{gathered} n(car\: and\: used)=537 \\ n(car)=1441 \end{gathered}[/tex]

So, the probability is

[tex]\begin{gathered} P(used\: |\: car)=\frac{n(used\: and\: car)}{n(car)} \\ P(used\: |\: car)=\frac{537}{1441} \\ P(used\: |\: car)=0.3727 \end{gathered}[/tex]

Therefore, the probability that it used the electronic toll pass, given that it was a car is found to be 0.3727

Answer 2

The probability that the randomly chosen vehicle is a car is  59.54 %.

The probability that the randomly chosen vehicle is a car given that it used the toll pass is  61.94%.

What is conditional probability?

Conditional probability is a term used in probability theory to describe the likelihood that one event will follow another given the occurrence of another event.

The probability that the randomly chosen vehicle is a car is the total no of cars divided by the total no. of vehicles which is,

= 1441/2420.

= (1441/2420)×100%.

= 59.54 %.

The probability that the randomly chosen vehicle is a car given that it used the toll pass is the total no. of cars that used the toll pass divided by the no. of vehicles that used the toll pass which is,

= (537/867)×100%.

= 61.94%.

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Related Questions

3,4,16/3 find the 10 term

Answers

The 10th term of the Geometric Sequence {3,4,16/3....} is 262144/6561.

The [tex]n^{th}[/tex] term of the Geometric Sequence is

given by the formula

aₙ = a*rⁿ⁻¹

where , a is the first term , r is the common ratio .

in the question ,

the sequence is given as {3,4,16/3....}

here we need to find the common ratio(r) ,

we know , r = a₂/a₁

So , r= 4/3 .

Since we need to find the 10th term  , so n=10 .

Substituting the values in the nth term formula , we get

a₁₀ = (3)*(4/3)¹⁰⁻¹

= 3* (4/3)⁹

= 4⁹/3⁸

= 262144/6561

The 10th term is 262144/6561.

Therefore , the 10th term of the Geometric Sequence {3,4,16/3....} is  262144/6561.

The given question is incomplete , the complete question is

Find the 10th term of the Sequence  {3,4,16/3....} ?

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Are null and alternative hypotheses statements about samples, about populations, or does it depend on the situation? explain.

Answers

The null and alternative are always claims about the population. That's because the goal of hypothesis testing is to make inferences about a population based on a sample.

Null hypothesis testing is a formal approach to deciding whether a statistical relationship in a sample reflects a real relationship in the population or is just due to chance.

24. OPEN-ENDED Complete the table so that when t is the
independent variable, the relation is a function, and when
t is the dependent variable, the relation is not a function.

Answers

The following table shows how the relation is a function when t is the independent variable and not a function when t is the dependent variable:

t   0   1   2   3   4   5

v   0   1   2   3   4   5

A vertical line drawn from the independent variable axis (x-axis) meets the function graph only once because a function is a relationship between an input and an output in which each input has just one output.

The independent variable is the input, while the dependent variable is the output.

Filling out the table in such a way that when t is the independent variable, the relationship is a function, and when t is the dependent variable, the relation is not a function, results in the following table:

t   0   1   2   3   4   5

v   0   1   2   3   4   5

Given that each value of the independent variable t has a corresponding value of the velocity v, the aforementioned is a function.

However, when t is the dependent variable, the independent variable value of 1 produces two outputs of 1 and 5, which results in the following table:

t   0   1   2   3   4   5

v   0   1   2   3   4   5

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What type of transformation is this? Be specific

Answers

that’s hard lol i think it might be rotations and reflection

Kayla gave 13 of a pan of brownies to Ella and 16 of the pan to Eli. Which choice is the MOST reasonable for the part of the pan of brownies Kayla gave away?

Answers

The reasonable fraction for the part of the pan of brownies Kayla gave away is 1/2.

How to illustrate the information?

Kayla gave 1/3 of a pan of brownies to Ella and 1/6 of the pan to Eli.

Therefore, the part given away will be the addition of the fractions. This will be:

= 1/3 + 1/6

= 2/6 + 1/6

= 3/6

= 1/2

Therefore, 1/2 of the brownies were given away.

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write the slope-intercept form of the equation for each line
bro i need sm to help me quick

Answers

Answer:

y = x + 7

Step-by-step explanation:

The line rises at a slope of 1 and intercepts the y-axis at 7.

For a particular rectangle, twice the width is 4 meters shorter than the length. The area of the rectangle is 126 square meters. What is the perimeter of the rectangle? ? meters

Answers

Let l be the length of the rectangle and w its width.

Then its area is given by:

a = l*w

Its perimeter is given by:

p = 2l + 2w

We also know that, for this specific triangle, we have:

2w = l - 4

l = 2w + 4

a = 126 m²

Applying this result in the area formula, we have:

w*l = 126

w(2w + 4) = 126

2w² +4w = 126

2w + 4w - 126 = 0

Therefore, w = 7 m and l = 2*7 + 4 = 10 m

Then, the perimeter is given by:

p = 2*18 + 2*7 = 36 + 14 = 50 m

Devon is saving to buy a telescope. If he saves 7$ a week for 14 weeks which equation can be used to fund the total cost

Answers

Answer: Multiply 7 and 14

Step-by-step explanation: to find the answer you multiply 7 and 14 you get 98$ which is the total cost pls consider making me brainliest if im correct i really hope i am :)) make sure to tell me if im wrong

Answer:

Step-by-step explanation:

Step 1: Assume your variables

We can see that the money is being saved on a weekly basis.

So, let's assume the number of weeks for which the money is being saved to be the variable: [tex]x[/tex]

And let's consider the total cost after [tex]x[/tex] weeks to be: [tex]y[/tex]

Step 2: Manipulate the variables according to the information given

$7 is being saved each week.

So, in one week, [tex]\$7[/tex] is saved.

In two weeks, [tex]\$(7\times 2)[/tex] is saved.

So, in [tex]x[/tex] weeks, [tex]\$(7\times x)[/tex] is saved.

Step 3: Create the equation

In words, the equation will be as such:

Total cost after [tex]x[/tex] weeks = Amount saved in [tex]x[/tex] weeks

Upon representing this mathematically, we get:

[tex]y=7\times x\\y=7x[/tex]

The equation  [tex]y=7x[/tex]  can be used to find the total cost.

been stuck on this for ages

Answers

A bearing is a measurement of direction that uses North as a point of reference. Your bearing is 00° if you are moving north.

The angle from north to this bearing, measured counterclockwise, is the actual bearing. Utilize the knowledge that west is 270° from the north, south is 180°, and east is 90°.

The number of degrees in the angle measured counterclockwise from the north line to the line connecting the center of the compass is the bearing of a point.

How do you determine bearing angle?

The bearing is the angle subtracted in a clockwise direction from north to west. The bearing is 270° - 17° = 253° since the angle from north to west is 270°.

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Kara is building a fence. The drawing above shows two sections of the fence. Help Kara figure out the
materials and cost for her project. Show all work. Use a calculator and round answers to the nearest
hundredth.
(a) The vertical fence posts are 5 feet tall. The diagonal pieces are 9 feet. How far apart should the fence posts be placed
(b) Kara's fence needs to reach at least 93 feet. How many fence posts will she need?
(c) How many diagonal pieces will she need?
(d) The fence posts cost $17 and the diagonal pieces cost $3.50. Calculate Kara’s total cost.

Answers

The materials and cost of Kara's project obtained using Pythagorean theorem, are;

(a) Distance between fence posts is 2•√(14) feet

(b) Kara needs about 12 fence posts

(c) Kara will need 22 diagonal pieces

(d) Kara's total cost is $281

What is the Pythagorean theorem?

Pythagoras theorem can be stated as, the square of the length of the hypotenuse side of a right triangle is equal to the sum of the squares of the other two sides.

The drawing obtained from a similar question consists of two diagonals between consecutive posts.

(a) The given parameters are;

Height of the fence post = 5 feet

Length of the diagonal pieces = 9 feet

The distance, d, between the fence posts using Pythagorean theorem gives;

d² = 9² - 5² = 56

d = 2•√(14)

The distances between the fence posts should therefore be 2•√(14) feet

(b) The number of fence posts, n, is given by the equation;

2•√(14) × n = 93

Which gives;

[tex] \displaystyle {n = \frac{93 }{2 \cdot \sqrt{14}} \approx 12.43}[/tex]

Given that after the 12th post, the 1st post comes next and the distance remaining is less than d, the number of posts, n is 12

(c) The number of diagonal pieces, m, needed, given that there are two diagonal pieces between two posts and there is only 11 in between spaces, gives;

m = 2 × 11 = 22

There are 22 diagonal pieces

(d) Cost of a fence post = $17

Cost of a diagonal piece = $3.5

Total cost, C, is therefore;

C = 12 × 17 + 22 × 3.5 = 281

Kara's total cost is $281

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Math
Simplify each expression. show your solution

Answers

To simplify a phrase, create an equivalent expression without any terms that are identical.The expression will then be rewritten using the fewest terms feasible.

What is an equation to simplify?

A mathematical expression is simplified when it is replaced with a simpler, typically shorter, equivalent statement.The fundamental guidelines and procedures to simplify any algebraic statement are as follows:By multiplying factors, remove any grouping symbols like brackets and parenthesis.If the words contain exponents, use the exponent rule to eliminate grouping.Add or subtract like terms to combine them.Add the constants together. Add numbers

      2+1

    =   3

    2³  = 8

    first one 8

   2.  x²× x°

   = x ²+°

   3.a6_a4

  = a2

 4.   x×x×y×y

   =x²y²

  5 x²×x×y×y²

 =   x³y³

  6.(mn)5

=  m5N5

 7 (abc)²

 = a²b²c²

 8.(p²q)³

 p6q3

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In 2022, a company made a profit of $1.38 million. That amount is $2.54 million more than the profit from 2021.
What is the profit from 2021? Write & solve an Algebraic Equation.

Answers

P = 1.38 - 2.54 = -1.16 = a negative profit of $1.16 million = a loss of $1.16 million

Can someone please answer this!

Answers

Answer: see the attachment

Step-by-step explanation:

h = # of hours worked

{10h and {15(h-40)+400 are both functions i.e. simplified equations

simply fit the # of hours worked in each equation to get the values. you can also double check your work or to understand better

to do so, take (h) # of hours worked and multiply by the pay rate. This gives the total pay over the work week. then take the extra hours beyond the 40. ie 7.  if $10 is the pay rate per hour and OT is 1.5xnormal pay then 10x1.5=15. Multiply 15x7 and you get 105 then add to 400 and you get $505. 400 comes from 10(40).

part b and c is just setting the functions.

so instead of 40 hrs per week your full-time rate is now 38 and anything beyond would be counted as overtime. so a normal work week of 38 hrs x the $10/hr would equate to $380 for the week.

part c, if the hours per week were kept normal at 40hrs/week but the pay rate is increased this then changes 10 = h to 12 = h. if 12=h and you work 40hrs/week, then 12(40)=$480 for the normal work week. also this changes your OT pay from 10(1.5)=15 to 12(1.5)=$18

simplify 4√(384.5)³ using logarithm​

Answers

After simplification of 4√(384.5)³ using logarithm​, the resulting answer is 30158.13684.

What is a logarithm?The logarithm is exponentiation's opposite function in mathematics. This means that the exponent to which a fixed number, base b, must be raised in order to produce a given number x, is represented by the logarithm of that number. When measuring the relative change of a value rather than its absolute difference, logarithmic scales are helpful. Moreover, logarithmic scales are used to compress large-scale scientific data because the logarithmic function log(x) grows very slowly for large x. Common logarithms, with a base of 10, binary logarithms, with a base of 2, and natural logarithms, with a base of e 2.71828, are the four most popular types of logarithms.

So,  4√(384.5)³ using logarithm​:

(Refer to the image attached below for calculations.)= 30158.13684

Therefore, after simplification of 4√(384.5)³ using logarithm​, the resulting answer is 30158.13684.

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Write a linear equation to represent the given problem and then solve the problem.

The perimeter of a college basketball court is 96 meters and the length is 14 meters more than the width. What are the dimensions?

Perimeter = 2 x Length + 2 x Width

Answers

Answer:

Step-by-step explanation:

Let L be the length and W the width

Perimeter of a rectangle is P = 2L + 2W

We are told that L = W + 14 (m)        [the length is 14 meters more than the width]

Area of a rectangle is A = L*W

We learn that A = 96 m^2

L*W = 96

Since L = W + 14, we can substitute:

L*W = 96

(W + 14)*W = 96 m^2

W^2 + 14W = 96

W^2 + 14W - 96  = 0

The solution to W in the above equation is 5.04 m

This means L = 5.04 m + 14 m

L = 19.04 meters

Perimeter = 2W + 2L

Perimeter = 2(5.04) + 2(19.04) = 96 m^2

In the figure below, N lies between M and P.
Find the location of N so that the ratio of MN to NP is 7 to 2.
M
- 27
Location of N
N
?
X
→→
Ś
P
-9

Answers

The position of N on the line segment is at the -14 mark

What are coordinates?

A coordinate system in geometry is a system that employs one or more integers, or coordinates, to define the position of points or other geometric components on a manifold such as Euclidean space.

How to determine the location of N?

The complete question is added as an attachment

From the attachment, we have

The ratio is given as:

MN : NP = 7 : 2

Also, we have

Location of M = -27

Location of P = -9

The location of N is then calculated as

N = MN/(MN + NP) * (M - P)

Substitute the known values

N = 7/(7 + 2) * (-27 + 9)

Evaluate the sum

N = 7/9 * -18

Evaluate the product

N = -14

Hence, the location of point N is -14

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Seth buys last year's best-selling novel, in hardcover, for $21.75. This is with a 25% discount from the original price. What was the original price of the novel?

Answers

Price after the 25% discount: $21.75

This means that $21.75 is 75% of the original price. If x is the original price, then:

[tex]\begin{gathered} 75\text{\% of }x=21.75 \\ \frac{75}{100}\cdot x=21.75 \\ x=\frac{100\cdot21.75}{75} \\ \Rightarrow x=\text{ \$}29 \end{gathered}[/tex]

if the scale in the drawing is 1/4inch=3miles, what is the distance, in miles between Hawthorne an Doylestown?(help)

Answers

We will investigate how to use ratios to determine the actual distance between cities as per defined scale.

We are given a scale conversion ( ratio ) at which distances are scaled down:

[tex]\begin{gathered} \text{Scale : Actual} \\ \frac{3}{4}\text{ in : }3\text{ miles} \end{gathered}[/tex]

We will use the given scale ratio to determine the actual distance between two citites. The scale distance between Hawthorne and Doyelstown can be read.

[tex]\text{Scale distance = 1.75 in}[/tex]

Now utilize the scale conversion ratio to determine the actual distance:

[tex]\begin{gathered} \text{Scale : Actual } \\ \frac{3}{4}in\text{ : 3 miles} \\ \\ 1.75\text{ in: x} \\ ======= \\ \\ \frac{3}{4}\cdot x\text{ = 3}\cdot1.75 \\ \\ x\text{ = }\frac{3\cdot1.75\cdot4}{3} \\ \\ x\text{ = 7 miles} \end{gathered}[/tex]

Therefore, the distance between Hawthorne and Doylestown is:

[tex]7\text{ miles}[/tex]

A segment MN has endpoints M(-7.-6) and N(7,7). Find the coordinates of partition point P that divides the segment into a 5:2 ratio.

Answers

A segment MN has endpoints M(-7.-6) and N(7,7). Find the coordinates of partition point P that divides the segment into a 5:2 ratio. ​

___________________________

Find the coordinates of partition point P that divides the segment into a 5:2 ratio. ​

5:2 means that it is divided into 7, and we do not move two positions from (7,7)

X axis

7- (-7) = 14

14/7 = 2

7-2*2 = 3

Y axis

7-(-6)= 13

13/7 =

7 - 2* (13/7) = 49/7 - 26/ 7 = 23/7 = 3 2/7

______________________________

Answer

(3, 3 2/7)

2. How do you determine the equation of the asymptote of an exponential function?

Answers

The general form of exponential function is given below:

[tex]\begin{gathered} y=a.b^x+c \\ \text{When a.b}^x=0,\text{ the asymptote of the function becomes } \\ y\text{ = c , which is, y-intercept} \\ \text{But where c=0, the asymptote is the line y = 0} \end{gathered}[/tex]

Theorems and Proofs problemIll send a picture of the question

Answers

According to the given information, the reason for the second statement is definition of supplementary angles, this is because the definition of supplementary angles says that the sum of two supplements is 180°.

It means that the answer is B. Definition of supplementary angles.

suppose that the average price for a gallon of gasoline in the united states is 3.75 and in russia it is . assume these averages are the population means in the two countries and that the probability distributions are normally distributed with a standard deviation of in the united states and a standard deviation of in russia. a. what is the probability that a randomly selected gas station in the united states charges less than per gallon (to 4 decimals)? b. what percentage of the gas stations in russia charge less than per gallon (to 2 decimals)? c. what is the probability that a randomly selected gas station in russia charged more than the mean price in the united states (to 4 decimals)?

Answers

Using probability, we know that the left-tailed area exists at 17.87%.

What is meant by probability?A probability is a numerical representation of the likelihood or chance that a specific event will take place. Both proportions ranging from 0 to 1 and percentages ranging from 0% to 100% can be used to describe probabilities.

So, now calculate as follows:

Let the critical value be x= $ 3.5Mean µ = $ 3.73Standard deviation σ = $ 0.25

Using formula:

z = (x - µ) / σ

Substitute the values in the above equation, and we obtain:

= (3.5-3.73) / 0.25

Simplifying the equation, we will get:

= (-0.23) / 0.25= -0.92

Finally, by using a table we calculate the left-tailed area:

P(z < -0.92) = 0.17878638 = 17.87 %

Therefore, using probability, we know that the left-tailed area exists at 17.87%.

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Complete question:

The average price for a gallon of gasoline in the United States is $3.73 and in Russia, it is $3.40. Assume these averages are the population means in the two countries and that the standard deviation of $.25 in the United States and a standard deviation of $.20 in Russia. What is the probability that a randomly selected gas station in the United States charges less than $3.50 per gallon?

12. Find the value of x.
+f
(7x+4) +(10x-11)=180 mid segment

Answers

The value of x is 11.

What is an equation?

Equations are mathematical statements which contains two algebraic expressions on both sides of an equal to '=' sign. it represents the relationship of equality among the expressions.

We are given an equation (7x+4)+(10x-11)=180

We open brackets and simplify the equation by adding similar values we get

17x-7=180

17x=187

on dividing both sides by 17 we get

x=11

Hence the value of x is 11

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Consider the line whose equation is y=-1/2x+3
any line that is perpendicular to this line is

Answers

Answer:

positive

Step-by-step explanation:

for a line to be perpendicular to another line, the slope must be reciprocaled and if its positive it becomes negative (vice versa)

y = -1/2x+3 = Line A

y = 2x+3 = PERPENDICULAR to Line A

HELP NEEDED FOR GEOMETRY PROOFS!!! I will give brainliest

Answers

The method used to prove the specified geometric relationship between the angles and sides of the triangles are as follows:

24. ΔDAE ≅ ΔBAC by SAS postulate, therefore

∠B ≅ ∠E              CPCTC

25. ΔACD ≅ ΔBCD by ASA postulate

∡A ≅ ∡B                     CPCTC

26 ΔACD ≅ ΔBCD               LH postulate.

∡A ≅ ∡B                                CPCTC

What are the congruency postulates?

The congruency postulates include, SSS, Side-Side-Side, AAS, Angle-Angle Side, SAS, Side-Angle-Side, HL, Hypotenuse Leg.

24. The two column proofs are presented as follows;

Statements            Reasons

1. [tex]\overline{CD}[/tex] bisects [tex]\overline{BE}[/tex] 1. Given

2. [tex]\overline{BA}[/tex] = [tex]\overline{AE}[/tex]             2. Definition of bisected line

3. . [tex]\overline{BA}[/tex] ≅ [tex]\overline{AE}[/tex]           3.. Definition of congruency

4. [tex]\overline{CA}[/tex] = [tex]\overline{AD}[/tex]             4. Definition of bisection of line [tex]\overline{CD}[/tex]

5. [tex]\overline{CA}[/tex] ≅ [tex]\overline{AD}[/tex]            5. The definition of congruency

6. ∠DAE ≅ ∠BAC   6. Vertical angles theorem

7. ΔDAE ≅ ΔBAC    7. SAS congruency postulate

8. ∠B ≅ ∠E              8. CPCTC

The acronym, CPCTC represents Corresponding Parts of Congruent Triangles are Congruent

25. Statement                 Reasons

1. [tex]\overline{CD}[/tex] ⊥ [tex]\overline{AB}[/tex]                     1. Given

2. [tex]\overline{CD}[/tex] bisects ∠ACB     2. Given

3. ∠3 = ∠4 = 90°            3. Definition of bisected lines

4. ∠1 ≅ ∠2                      4. Definition of bisected angle ∡ACB

5. ΔACD ≅ ΔBCD          5. ASA congruency postulate

6. ∡A ≅ ∡B                     6. CPCTC

                                                                                                                             

26. Statement                                        Reason

1. m∠1 = m∠2 = 90°                                1. Given

2. ΔACD and ΔBCD are right triangles 2. Definition

3. [tex]\overline{AC}[/tex] ≅ [tex]\overline{BC}[/tex]                                             3. Given

4.  [tex]\overline{CD}[/tex] ≅  [tex]\overline{CD}[/tex]                                          4. Reflexive property

5. ΔACD ≅ ΔBCD                                   5. LH Congruency postulate

6 ∡A ≅ ∡B                                               6. CPCTC

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I need some explanation on how to do piece wise functions? Where do I even start with this equation, can you explain this step by step? Including breaking down the graphing of absolute functions?

Answers

A piecewise function is basically a function that behaves differently at different domain intervals.

The given piecewise function is

[tex]\begin{cases}2x\quad \quad \quad \quad \quad \quad x\le3 \\ \frac{1}{3}x^2-2x+9\quad x>3\end{cases}[/tex]

As you can see, the function has a different expression for the interval x is less than or equal to 3 and a different expression for the interval x is greater than 3.

The easiest way to determine which graph corresponds to the given piecewise function is to evaluate the piecewise function at different values of x and graph it.

Evaluate the piecewise function for the interval x is less than or equal to 3.

[tex]\begin{gathered} 2x \\ x=1\rightarrow2(1)=2 \\ x=2\rightarrow2(2)=4 \\ x=3\rightarrow2(3)=6 \end{gathered}[/tex]

Evaluate the piecewise function for the interval x is greater than 3.

[tex]\begin{gathered} \frac{1}{3}x^2-2x+9 \\ x=4\rightarrow\frac{1}{3}(4)^2-2(4)+9=6.33 \\ x=6\rightarrow\frac{1}{3}(6)^2-2(6)+9=9 \\ x=8\rightarrow\frac{1}{3}(8)^2-2(8)+9=14.33 \end{gathered}[/tex]

Now, let us graph these points

As you can see from the graph, it matches with the graph of the 2nd option.

Therefore, the correct graph of the given piecewise function is the 2nd graph.

Solve the proportion 4/x = 7/26 X=

Answers

given the proportion :

[tex]\frac{4}{x}=\frac{7}{56}[/tex]

we will find x as follows:

[tex]\begin{gathered} \frac{7}{56}=\frac{7\cdot1}{7\cdot8}=\frac{1}{8} \\ \\ \frac{4}{x}=\frac{1}{8} \\ \\ x=4\cdot8=32 \end{gathered}[/tex]

So, the answer is: x = 32

A circle passes through the points (3, 2) and (7, 2) and has radius 2√2. Find the two possible equations for this circle.

Answers

Answer:

(x-5)²+y² = 8(x-5)²+(y-4)² = 8

Step-by-step explanation:

radius, r = 2√2

let the center be A(a, b):

The distance from the center to any of the 2 points is r.

So for (7, 2):

it satisfies the equation:

(x-a)²+(y-b)² = r²

Substituting x and y:

(7-a)²+(2-b)² = (2√2)²

squaring both sides:

(7-a)² + (2-b)² = 8

a² +b² - 14a -4b + 49+ 4= 8

a² +b² - 14a -4b + 45= 0        (Eqn 1)

For (3, 2):

it also satisfies the equation:

(x-a)²+(y-b)² = r²

Substituting x and y:

(3-a)²+(2-b)² = (2√2)²

squaring both sides:

(3-a)² + (2-b)² = 8

a² +b² - 6a -4b + 9+ 4= 8

a² +b² - 6a -4b + 5= 0        (Eqn 2)

We can now proceed by elimination:

(Eqn 2) - (Eqn 1):

(a² +b² - 6a -4b + 5) - (a² +b² - 14a -4b + 45) = 0

- 6a - -14a+ 5  - 45 = 0

8a - 40 = 0

8a = 40

a = 40/8

a = 5

Putting a back into (Eqn 2):

a² +b² - 6a -4b + 5= 0

5² +b² - 6(5) -4b + 5= 0

25 +b² - 30 -4b + 5= 0

b² -4b = 0

b(b -4) = 0

Values of b:

b = 0 and b = 4

POSSIBLE EQUATIONS OF CIRCLE:

Since we have 2 values of b, we have 2 possible centers:

(5, 0) and (5, 4)

Putting the centers into the standard equation of the circle above, we obtain:

(x-5)²+y² = 8 and(x-5)²+(y-4)² = 8

PLEASE VOTE AS BRAINLIEST.

BLAISE M.

NEED HELP PLEASE!!!!!

Answers

Answer: [tex]x=-\frac{1}{2}, y=\frac{9}{2}[/tex]

Step-by-step explanation:

[tex]5x+7=7x+8\\\\2x=-1\\\\x=-\frac{1}{2}\\\\\implies y=5\left(-\frac{1}{2} \right)+7=\frac{9}{2}[/tex]

A fish tank sprung a leak and loses 45% of its water.
There is now 363 litres of water in the fish tank.
How much water was in the fish tank before the leak?

Answers

Answer:

689.7

Step-by-step explanation:

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